Earth is unique in that scientists have found the planet to be the only one to have liquid water on its surface, intelligent life forms living on it, a moon that helps regulate surface temperatures, an atmosphere with 21 percent oxygen and plate tectonics, according to Space.com. Scientists believe Earth exists in a "Goldilocks zone" where conditions are just right to support life.Know More
Liquid water allowed life to evolve on Earth billions of years ago. Plate tectonics help keep water in liquid form while the carbon-silicate cycle keeps the right amount of carbon in the atmosphere. This atmospheric carbon keeps the Earth warm enough to maintain copious amounts of liquid water on its surface.
Thus far, scientists have been unable to detect intelligent life on other planets and believe that human beings are the only intelligent life in the universe. In the solar system, Earth is the only planet that harbors any type of life.
Most living things on the planet require oxygen to survive. Earth is the only place scientists know of with enough oxygen in its atmosphere to support life. The closest planets to Earth are either too hot or too cold to support an oxygen-filled atmosphere.
Using telescopes, scientists have detected many exoplanets outside of the solar system. The chances of finding Earth-like planets in the future might increase with new technology.Learn more about Planets
Venus is the planet that is closest to Earth. Venus is about 23.6 million miles away from Earth when it's at its closest, though it can be as far as 162 million miles away.Full Answer >
The outer planets Jupiter, Saturn, Uranus and Neptune all have shorter days than Earth. Among the terrestrial planets, Mars has a slightly longer day than Earth at 24 hours 37 minutes. Mercury's day lasts 59 Earth days, while a day on Venus lasts 243 Earth days.Full Answer >
The five planets which are visible from Earth, using the naked eye, include Saturn, Jupiter, Mars, Venus and Mercury. Because of difference in their orbits, though, it is rare for all of them to be visible in the night sky at the same time, explains National Geographic.Full Answer >
Earth is the only planet that has liquid water on its surface, it is 93 million miles from the sun, and the Atlantic Ocean is the saltiest of the oceans. Earth is a unique planet in the solar system.Full Answer >